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EXTENDED DWELL PAPER DECURLER

Publishing Venue

Xerox Disclosure Journal

Abstract

Present methods of producing color images using color xerographic technology places a large toner layer on paper before bonding the toner layer to the paper using a fusing process. Water previously in paper prior to fusing evaporates following fusing and setting of the toner layer. Water loss in paper due to evaporation causes an environmental imbalance in the paper. As paper reabsorbs lost water due to the imbalance, paper expands and curls towards the toner layer since that side of the paper is dimensionally stable. Adding water after fusing is one means of avoiding water imbalance.

Country

Undisclosed

Language

English (United States)

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XEROX DISCLOSURE JOURNAL

EXTENDED DWELL PAPER DECURLER Rabin Moser

Proposed Classification U.S. C1.3551200 Int. C1. G03g 15/00

FIG. I

XEROX DISCLOSURE JOURNAL - VoL 17, No. 4 July/August 1992 223

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Page 2 of 2

EXTENDED DWELL PAPER DECURLiER(Cont'd)

Present methods of producing color images using color xerographic technology places a large toner layer on paper before bonding the toner layer to the paper using a fusing process. Water previously in paper prior to fusing evaporates following fusing and setting of the toner layer. Water loss in paper due to evaporation causes an environmental imbalance in the paper. As paper reabsorbs lost water due to the imbalance, paper expands and curls towards the toner layer since that side of the paper is dimensionally stable. Adding water after fusing is one means of avoiding water imbalance.

A method of adding moisture to paper while cooling and constraining it at the same time by using an extended dwell paper decurler is disclosed. A heat and pressure fuser apparatus comprising a fuser roll 10 and pressure roll 20 are illustrated together with an extended dwell paper decurler 60 in Figure 1. In this assembly, both fuser roll 10 and pressure roll 20 are mounted on bearings (not shown) which are biased so that the fuser roll 10 and pressure roll 20 are pressed against each other under sufficient pressure to form nip 30. It is in this nip that fusing action takes place. A fi...